Machine for finishing nuts



(No Model.) 7 5 Sheets- Sheet 1.-

. G. DUNHAM.

MACHINE FOR FINISHING NUTS.

No. 420,931. Patented Feb. 11,1890.

NY PETERS. Fhuln-Lilhugmpher. Waxhmghw, EC)

(No Model.)

5 Sheets-Sheet 2. G. DUNHAM.

MACHINE FOR FINISHING NUTS.

Patented Feb. 11,1890.

(No Model.) 5 Sheets-Sheet 3. G. DUNHAM. MACHINE FDR FINISHING NUTS.

N0. 420,931. Patented Feb. 11, 1890'.

mv PETERS P holo-Lllhcgnphlr. WaI-hinglnm n. c

(No Model.) 5 Sheets-Sheet 4.

G. DUNHAM. MACHINE FOR FINISHING NUTS.

No. 420,931. Patented Feb. 11, 1890;

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N. PETERS, Pllnlo-Llliwgmphar, washingmn. B. G

(No Model.) 5 Sheets-Sheet 5,

G. DUNHAM.

MAGHINE FOR FINISHING NUTS. No. 420,931. Patented Feb. 11, 1890.

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NITED STATES GEORGE DUNHAM, OF UNIONVILLE, CONNECTICUT.

MACHINE FOR FlNlSHlNG NUTS.

SPECIFICATION forming part of Letters Patent No. 420,931, dated February11, 1890.

Application filed March 25, 1889. Serial No. 304,694.

To all whom it may 00721067763 Be it known that I, GEORGE DUNHAM, acitizen of the United States, residing at Unionville, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Machines for Finishing Nuts, of which the following is aspecification.

My invention relates to improvements in machines for finishing nuts, andthe objects of my improvement are simplicity of construction and generaleiiiciency and convenience in operation.

In the accompanying drawings, Figure 1 is a front elevation of mymachine. Fig. 2 is a side elevation thereof. Fig. 3 is a detached view,on a reduced scale, showing a portion of the frame of the machine, oneof the cams,

and the lever operated thereby, the crankshaft being in verticalsection. Fig. 4 is a horizontal section of said machine on the line a ofFig. 1. Fig. 5 is a vertical section of detached portions thereof on theline y y of Fig.4, the slide and its punches being shown in elevation.Fig. 6 is a vertical section of parts thereof on line 2 z of 'Fig. 5.Fig. 7 is a horizontal sectional view of parts of the machinecorresponding with Fig. 4, excepting that some of the parts have beenremoved. Fig. 8 is a vertical section of parts thereof on line w w ofFig. 4; and Fig. 9 is an enlarged vertical section of detached parts inthe same plane as Fig. 6, but with the parts in a different position.

A few of the reference-characters where the parts are crowded have beenomitted from Fig. 1. g

The machine in its general form resembles an ordinary power-press.

A designates the frame; B, the crank-shaft; C, the punch-slide driventhereby; D, the driving-gear mounted on said crank-shaft, said gearbeing driven by the gear E on the main shaft F, which is provided withdrivingpulleys G and H. These parts are of ordinary construction, andother ordinary equivalent parts may be substituted for them.

In the punch-slide I arrange four punches, and within the bed of thepress underneath them four dies. Beginning at the left-hand side of thedrawings, the first one of these is the crowning-die 10 and its punchl1,the flattening-die and punch 12 and 13, the central- (No model.)

hole die and punch 14 and 15, and the trimming-die and punch 16 and 17.Upon the front and rear of these dies there are yielding gages or guides18, 19, 20, 21, 22, and 23. The gage 20 is made integral with itsspringshank 24, which is secured to the die-bed J. This gage is setwithits under face a little above the face of the crowning-die, so thatsaid gage may yield a little in a downward directionthat is, toward thedie-bed-while said gage also has the capacity of yielding in an edgewisedirection. The gage 21 back of the flattening-die 12 is mounted upon aslide 25, which is pressed upon by a spring 26 to keep it toward thefront, its forward motion being limited and adjusted by means of thesetscrew 27. This slide is guided in suitable ways in the cap-plate K,and the set-screw 27 bears against the rear edge of said cap-plate.

The gage 22 is arranged and adjusted in like manner in the upper side ofthe capplate upon the slide 28, said slide being provided with a spring29 and set-screw 30. This slide 28 is held down by the picker-plate 31,through which the punch 'works. The gage 23 works in a similar manner inguides formed in the upper side of the cap-plate K, and it is held inplace bya supplemental cap 32. This gage 23 is formed as an integralpart of abar or slide, and it is pressed forwardly by means of thespiral spring 33, its forward motion being limited and adjusted by meansof the'setscrew 34, Figs. 4 and 7. The gages for the front side of thedies have their spring-press ure arranged to draw them backwardly, sothat the springs force the gages toward each other. The gage 18, whichconfronts the gages and 21, is mounted upon the two slides 35, fitted insuitable ways in the bed J, which slides are pressed backwardly by meansof the springs 36, their backward motion being limited by means of theheads of the bolts 37, around which the springs 36 are coiled. The

gage 19 is mounted upon a like slide 38, and

held and adjusted in like manner by means of spring 39 and bolt 40. Thefront gage 41, in front of the trimming-die 16, is a yielding gagemounted upon arocking arm 42, pivoted at 43, so as to be held in itsposition for gaging by gravity. The rocking motion of thisgage and thatof the rocking arm 42 islimited and adjusted by means of the screw 44,which strikes a stop 45, that is secured stationarily upon the frame ofthe machine. Immediately underneath the gage 23, in suitable guides, Iarrange, the clearing-slide 46, which slides from the position in therear of the trimming die 16 (illustrated in Fig. '7) to a point forwardof said die, as illustrated in Fig. 9. Motion is imparted to said slideby means of the rocking arm 47 on the rock-shaft 48 at the rear of themachine, which shaft is moved in one direction by means of the lever 19,fulcrumed on the frame of the machine, with its lower end bearingagainst the rocking arm 50 on said shaft, and its upper end beingoperated upon by the cam 51 on the crankshaft- B, the contacting end ofsaid lever with said cam being preferably provided with a roller 52. Therock-shaft is moved in the opposite direction by means of the spring 53,Fig. 4. The clearing-slide 46 has rigidly connected :0 with its frontend a cam or projection 54, which, as said slide moves forwardly,strikes the gage 41 and swings it up out of the way, as shown in Fig. 9.The crowning-die 10. is provided with a knock-out pin 55, whose up- 2 5ward motion is limited and adjusted by means of the nut 56, Figs. 1 and5, and it is pressed into its uppermost position by means of the spring57.

Upon the front part of the machine, mov- 0 ing in suitable ways, Iarrange a transverse slide M. This slide M is reciprocated by means ofbeveled slides 58 59, the ends of which bear upon a roller 60, mountedupon said slide M. Said beveled slides are oper- 5 ated by means of thecams 61 62 and gear- Wheels 63 G3, the latter of which is 011 thecrank-shaft, which mechanism for operating the slide has been previouslypatented by me, and therefore it is not specifically a part of thisinvention, and any other mechanism for reciprocating said slide M toimpart to it the same movement-s I consider an equivalent for thisslide-operating mechanism for the purposes of the present invent-ion.This slide M bears an adjustable carrying-finger 64 Fig. 4, which fingeris in the form of an angle-arm, the operating member of which is adaptedto reciprocate between the yielding gages 18 and 20. It is held andadjusted in its position by means of the set-screws 65, Fig. 4. I alsoprovide the slide M with a finger-slide N, having three adjustablecarrying-fingers 66, the same being set a distance apart, measuring fromtheir forward or right-hand edges, equal to the distance from the centerof one of the dies to the center of the next succeeding die. The gages18 and 19 are of less thickness than the nuts to be operated-upon, sothat the fingers 66, which extend over the top of said gages, at timesmay engage the edges of the nuts at a point'above said gages. Thisfinger-slide is adapted to be reciprocated transversely to the movementof the slide M. It is actuated by means of the grooved cam 67 65 -on thecrank-shaft B, the lever 08, fulcrumed upon the frame of the machine,the pitman (39, rocking arm 70, rock-shaft 71, and rock- 1 saidcrowning-die.

ing arm 72. This latter arm is slotted, and is connected with thefinger-slide N by means of a rod 73, passing through the slot in saidarm,whereby said arm and slide are connected in such manner that thefinger-slide may move laterally with the slide M, while the rocking arm73 has no lateral movement. The fingers 66 are adjusted longitudinallyby being slotted and held down by bolts 74, which pass through the slotsin said fingers, and they are further secured and adjusted by means ofthe set-screws 75, which bear upon the rear ends of said fingers. Saidfingers may also be provided with means for adjusting them laterally;but this is not essential, as they should always have a given relationto each other and to the distance between the dies in a lateraldirection.

The nuts for being finished by this machine may be produced in anyordinary manner. I prefer to arrange them one upon the other in asuitable hopper, so as to. remove the nuts from the bottom of the hopperone by one, as in well-known machines for operating upon blanks; butsuch hopper is not essential, as the nuts may be placed within themachine one at a time by hand. At a time when the slide M is at or nearthe left-hand limit of its movement, the finger-slide at its rearmostposition over the space between the gages, and when the punch-slide iselevated (the parts being so timed as to come in these respectivepositions) a nut is dropped in between the yielding gages 18 and 20 atthe point illustrated by the nut '7 6, Fig. 4. The gages 18 and 20should be so arranged as to be slightly farther apart at'this point thanat the crowning-die, so that the nut may readily fall into positionbetween them, and then be from over the space between the gages into theposition illustrated in Fig. 6, and the punch-slide descends to bringthe punch 11 down upon the nut to force it into the crowning-die 10. Theslide M, with the fingers 66 drawn out of the way of the dies and nut,moves to the left again to the extent of its motion, the punch-slide iselevated, and the finger-slide again operates to carry the fingers intothe position shown in Fig. 4, when the left-hand finger 66 will becarried into a position on the left-hand side of the nut within or overthe crowning-die. The ordinary knock-out pin 55 releases the nut fromThe next movement of the slide M to the right carries another nut, asbefore described, and also carries a crowned nut to the flattening-dieand punch 12 and 13, when the movements of the machine be fore describedare repeated, another nut is crowned, and the one previously crowned isflattened. The first two of the fingers 66, by what may be called theirfour-four motion, come into a position upon the left-hand sides of therespective nuts so operated upon. Another nut is supplied and themachine makes the same movement as before, crowning and flattening thesucceeding nuts and punching or trimming the central hole by means ofthe die and punch 14 and 15. A repetition of these movements repeats theoperations before described, brings the righthand finger back of the nutlast punched, and brings the most advanced nut to the operation of thetrimming-die and punch 16 and 17, which trim the edges of the nut. Thepressure of the gages before the ,nut reaches the trimming-die should besuch as to hold the nuts firmly in place while the fingers are moving bythem to the left to obtain a fresh hold. After the nut has been trimmed,the clearing-slide 46 moves forwardly, lifts the gage 41 out of the way,and pushes the scrap from the top of the trimming-die into the passage77, through which it may pass out of the machine. The clearing-slide andgage 41 then return to their former positions and the operations arerepeated indefinitely so long as the supply of nuts is kept up. The nutis held firmly enough between the springpressed gage 23 and gage 41 toretain it in position for being acted upon by the trimmingdie and punch.

In some cases it may not'be desirable to trim the central hole in thenut, and in such case the die and punch 14 and 15 and righthand fingermay be omitted and the trimming-die and punch 16 and 17 occupy theposition of said die and punch 14 and 15 without making any otherchanges in the machine, the operations being precisely the same asbefore described, with the exception of punching the central hole. Evenwhen the machineis adapted for use with the centralhole-punching die andpunch its operation may be omitted, if desired, by merely removing thepunch 15 from the punch-slide, the only resultant change being that nooperation will be performed on the nut when it stops over the die 14.

I claim as my invention-- 1. In a machine for finishing-nuts, thecombination of a crowning-die and punch, a flattenin g-die and punch,and a trim ming-die and punch arranged in succession at given distancesfrom each other, and carrying devices to present the nuts successivelyto said dies and punches, substantially as specified.

2. In a machine for finishing nuts, the combination of a crowning-dieand punch, a fiattening-die and punch, a central-hole-trim min g die andpunch, and an edge-trimmin g die and punch arranged in succession atgiven distances from each other, and carrying devices to present thenuts successively to said dies and punches, substantially as specified.

3. The combination of a successive series of dies and punches, the gagesyielding under springpressure for bearing upon opposite edges of thenut, a series of carrying-fingers for moving the nuts along to saidseries of dies between said gages,'and operating mechanism,substantially as described, and for the purpose specified.

4. The combination of a die and punch for operating upon a nutas,forinstance, 12 and 13the gage 19 upon one side of said die, its slide35, spring 36 and bolt 37, the gage 21 upon the opposite side of saiddie, its slide 25, spring 26, and adj usting-screw 27, all substantiallyas described, and for the purpose specified.

5. The combination of the edge-trimming die and punch 16 17, gage 23,swinging gage 41, the clearing-slide 46, having the projection or cam 54for acting on said swinging gage, and mechanism for operating saidclearing-slide, substantially as described, and for the purposespecified. 6. The combination of a series of dies and punches, a seriesof front and rear gages, the gages in front of said dies being of lessthickness than the nuts to be operated upon, and a series ofcarrying-fingers arranged to operate over the top of said front gages,substantially as described, and for the purpose specified. I

7. The combination of a series of dies and punches, the slide M, thefinger-slide N, mounted on said slide M and moving at right anglesthereto, a series of fingers 66 on said fin ger-slide, and mechanism foroperating said slides, whereby the finger-slide moves in one directionat one end of the movement of the slide M and in the opposite directionat the other end of the movement of said slide M, substantially asspecified.

-8. The combination of a series of dies and punches, the yielding gagesfor bearing upon opposite edges of the nut, the slide M, the finger 64,rigidly mounted thereon, the fingerslide N, having fingers 66 andmounted to slide transversely to the movement of the slide M, andoperating mechanism, substantially as described, and for the purposespecified.

9. In a nut-finishing machine, the combination of the slide M, thefinger-slide N, mounted thereon and provided with the rod 73, mechanismfor reciprocating the slide M, and the slot-ted rocking arm 7 2 and itsoperating mechanism, said rod 73 passing through the slot of saidrocking arm, substantially as described, and for the purpose specified.

10. In a nut-machine, the combination of the clearing-slide having camor projection 54, the swinging gage 41, mounted on the rocking arm 42,the adjusting-screw 44, and astationary stop 45, substantially asdescribed, and for the purpose specified.

GEORGE DUNHAM.

Witnesses: t

E. G. DUNHAM, GEORGE E. ,TAFT.

